County Marin County, California - Population, Income & Demographics

The median income of households in Marin County, California was $142,785. An estimated 3.4% of households had income below $10,000 a year and 37.2% had income of $200,000 or more.

An estimated 76.6% of households received earnings. An estimated 35.1% of households received Social Security and an estimated 27.7 % of households received retirement income other than Social Security. The average income from Social Security was $27,184. These income sources are not mutually exclusive; that is, some households received income from more than one source.

In 2019-2023, 7.8 % of people were in poverty. An estimated 8.9% of children under 18 were below the poverty level, compared with 7.2% of people 65 years old and over. An estimated 7.7% of people 18 to 64 years were below the poverty level.

In 2019-2023, 4.8 % of households received SNAP (the Supplemental Nutrition Assistance Program). An estimated 37.5% of households that received SNAP had children under 18, and 43.9% of households that received SNAP had one or more people 60 years and over. An estimated 29.4% of all households receiving SNAP were families with a female householder and no spouse present.

Among the civilian noninstitutionalized population in Marin County, California in 2019-2023, 96.2% had health insurance coverage and 3.8% did not have health insurance coverage. Private coverage was 76.9% and public coverage was 35.3%, respectively. The percentage of children under the age of 19 with no health insurance coverage was 1.9%.

In 2019-2023, Marin County, California had a total population of 258,765 - 131,665 (50.9%) females and 127,100 (49.1%) males. The median age was 47.3 years. An estimated 19.7% of the population was under 18 years, 25% was 19 to 44 years, 29.9% was 45 to 64 years, and 23.3 % was 65 years and older.

In 2019-2023, there were 103,201 households in Marin County, California. The average household size was 2.44 people.

Married-couple households made up 51% of the households in Marin County, California while cohabiting couple households made up 6.8% of households. Female householders with no spouse or partner present were 27.7% of all households, while 14.4% of households had male householders with no spouse or partner present. Some households had one person, as 10.3% of households were male householders living alone, and 18.9% were female householders living alone, for a total of 29.2% of all households.

In Marin County, California, 28.1% of all households had one or more people under the age of 18; 40.7% of all households had one or more people 65 years and over.

In 2019-2023, an estimated 80.4% of the people living in Marin County, California were U.S. natives. 50.7% of the Marin County, California population were living in the state where they were born.

Approximately 19.6% of Marin County, California residents in 2019-2023 were foreign-born. 51.4% of foreign-born were naturalized U.S. citizens and an estimated 73.9 % entered the country before the year 2010.

Foreign-born residents of Marin County, California come from different parts of the world. The bar graph below displays the percentage of foreign-born from each world region of birth in 2019-2023 for Marin County, California.

Among people at least five years old living in Marin County, California in 2019-2023, 23.1 % spoke a language other than English at home. Spanish was spoken by 13.3% of people at least five years old; 9.6% reported that they did not speak English "very well."

In 2019-2023, 88.3 % of the people at least one year old living in Marin County, California were living in the same house one year earlier.

In 2019-2023, 92.7 % of people 25 years and over had at least graduated from high school and 60.5% had a bachelor's degree or higher. An estimated 7.3% did not complete high school.

The total school enrollment in Marin County, California was 59,167 in 2019-2023. Nursery school enrollment was 4,018 and kindergarten through 12th grade enrollment was 40,202. College or graduate school enrollment was 14,947.

In Marin County, California, among the civilian noninstitutionalized population in 2019-2023, 9.7 % reported a disability. The likelihood of having a disability varied by age - from 2.6% of people under 18 years old, to 6.4% of people 18 to 64 years old, and to 24.1% of those 65 and over.

In Marin County, California, 58.8 % of the population 16 and over were employed; 37.3% were not currently in the labor force.

An estimated 75.7% of the people employed were private wage and salary workers; 10.9% were federal, state, or local government workers; and 13.1 % were self-employed in their own (not incorporated) business.

In 2019-2023, the civilian employed population 16 years and older in Marin County, California worked in the following industries:

An estimated 53.7% of Marin County, California workers drove to work alone in 2019-2023, and 7.7% carpooled. Among those who commuted to work, it took them on average 28.3 minutes to get to work.

In 2019-2023, Marin County, California had a total of 111,860 housing units. Of these housing units, 70.6% were single-family houses either not attached to any other structure or attached to one or more structures (commonly referred to as "townhouses" or "row houses"). 27.7% of the housing units were located in multi-unit structures, or those buildings that contained two or more apartments. 1.3% were mobile homes, while any remaining housing units were classified as "other," which included boats, recreational vehicles, vans, etc.

2.6% of the housing inventory was comprised of houses built since 2010, while 12.7% of the houses were first built in 1939 or earlier. The median number of rooms in all housing units in Marin County, California was 5.4 rooms, and of these housing units 58.8% had three or more bedrooms.

In 2019-2023, Marin County, California had 103,201 housing units that were occupied or had people living in them, while the remaining 8,659 were vacant. Of the occupied housing units, the percentage of these houses occupied by owners (also known as the homeownership rate) was 63.9% while renters occupied 36.1%. The average household size of owner-occupied houses was 2.5 and in renter-occupied houses it was 2.34.

8.6% of householders of these occupied houses had moved into their house since 2021, while 15.4% moved into their house in 1989 or earlier. Households without a vehicle available for personal use comprised 4.4% and another 21.7% had three or more vehicles available for use.

The following chart provides the primary fuel used to heat houses in Marin County, California:

In 2019-2023, the median property value for owner-occupied houses in Marin County, California was $1,390,000.

Of the owner-occupied households, 67.3 % had a mortgage. 32.7% owned their houses "free and clear," that is without a primary mortgage or loan on the house. The median monthly housing costs for owners with a mortgage was $4,000+ and for owners without a mortgage it was $1,254.

For renter-occupied houses, the median gross rent for Marin County, California was $2,584. Gross rent includes the monthly contract rent and any monthly payments made for electricity, gas, water and sewer, and any other fuels to heat the house.